14A-18 Service Information Guide (All) Note The tightening torque for connectors (except brass tapered screws) is only applied when the mating side is not made of aluminum. Note For the elbow-type connector, tighten it with the minimum torque shown above and then tighten it further until the angle matches. Apply Loctite 575 to the threaded portion and tighten. Completely dry and then let air in after tightening. Do not use seal tape, etc.
Connector (Brass tapered screws) Screw size PT（R）1/8 PT（R）1/4 PT（R）3/8 PT（R）1/12 ― ： 2.0 to 14.7 N・m { 0.20 to 1.50 kgf・m / 18 to 130 lb・in } ： 4.9 to 15.7 N・m { 0.5 to 1.6 kgf・m / 43 to 139 lb・in } ： 9.8 to 16.7 N・m { 1.0 to 1.7 kgf・m / 87 to 148 lb・in } ： 9.8 to 17.7 N・m { 1.0 to 1.8 kgf・m / 87 to 157 lb・in } Connectors (Except brass tapered screws) Screw size PT（R）1/8 PT（R）1/4 PT（R）3/8 PT（R）1/2 PT（R）3/4 ― ： 5.9 to 11.8 N・m { 0.6 to 1.2 kgf・m / 52 to 104 lb・in } ： 14.7 to 29.4 N・ m { 1.5 to 3.0 kgf・ m / 11 to 22 lb・ft } ： 29.4 to 39.2 N・ m { 3.0 to 4.0 kgf・ m / 22 to 29 lb・ft } ： 29.4 to 58.8 N・ m { 3.0 to 6.0 kgf・ m / 22 to 43 lb・ft } ： 58.8 to 98.0 N・ m { 6.0 to 10.0 kgf・m / 43 to 72 lb・ft }